Shade structure



FIG. 1 is a front elevation view of the shade structure of the present invention, the rear elevation view being identical thereto;

FIG. 2 is a right side elevation view, the left side elevation view being a mirror image thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is an isometric view thereof. 

The ornamental design for a shade structure, as shown and described. 